Stove burner



J1me 1941- A. J. WHITCOMB ETAL 2,247,039

STOVE BURNER Filed Dec. 16, 1938 2 Sheets-Sheet 1 -Fi .I

' 'INVENTORS Arthur J. Whi comb 0laf C. Callozq W1 lf'r'ed 6'. 5 ch afield A TTORNEYS.

June 24, 194-1. Y A. J. WHITCOMB ETAL 2,247,039

STOVE BURNER Filed Dc. 16, 1938 2 Sheets-Sheet 2 INVENTORS Arfhur JWhiicomb Olaf C. Callow Nilfred (.Schof'z'eld By ATTORNEYS.

i atenteci June 24, 1941 UNITED, STATES PATENT OFFICE Arthur J. Whitcomb, Olaf c. Callow, and Wilfred C. Schofield, Chicago, 111., assignors to Freyn Engineering Company, Chicago, 111., a corporation of Maine Application December 16, 1938, Serial No. 62,46,140

7 Claims. (.01. 158-109) The present invention relates to improvements in stove burners.

In blast furnace practice it is common to provide hot blast stoves filled with refractory material, which refractory material is heated by flame from a burner or products of combustion from a burner. The heat thus imparted to the refractory material is thereafter imparted to :air which is directed through the stoves to the furnace. When the air to be heated is directed through the stove the burner is disconnected from the stove and a stove door closure is moved into position to close the opening formerly presented to the burner. Inasmuch as the burner is a relatively heavy piece of mechanism it is convenient to provide a spool or distance piece which may be inserted between the burner and the stove opening to complete the passage or connection between said burner and the stove opening during the period when gas is being burned in the stove. During the time when the stove is on blast, the stove door opening is sealed by a solid cover, at which time the spool or distance piece is removed.

An object of the present invention is to provide an improved burner construction having a spool or distance piece for connecting the burner with the stove which may be readily manipulated and will be safe in service.

A further object is to provide a burner construction which is positive in its action, which may be readily sealed and which will insure the separation of the gas and combustion air up to a point where the combination of the gas and air is desirable.

A further object is to provide a burner construction which is-well adapted to meet the needs of commercial service.

Further objects will appear as the description proceeds.

Referring to the drawings- Figure 1 is a view in side elevation, parts being broken away, showing one embodiment of the present invention;

Figure 2 is a top plan view, partly in section, of the construction shown in Figure 1, the sectional part of Figure 2 being taken along the plane indicated by the arrows 22 of Figure 1;

Figure 3 is a view in elevation, parts being broken away, the broken away part being taken along the plane indicated by the arrows 3-3 of Figure 1;

Figure 4 is a sectional view taken along the plane indicated by the arrows 4.4 of Figure 2; and

, indicates a burner cooperatively associated with the stove I0. Associated with the burner II is the fan box l2 provided with a fan adapted to be drivenby the motor I3. The numeral I4 indicates a conduit for combustible gas. Said conduit I4 and the fan box I2 direct gas and air, respectively, to the chamber I5. As indicated in Figure 2, the chamber I5 is provided with longitudinally extending bafiies I6 to keep the air from the fan box I2 and the gas from the I conduit I4 separated, whereby there will be no combustion of said gas and air within said chamber I5.- Thebaffles I6 are box-like in construction and preferably have tapering extremities lBa presented toward the fan box I2. Air from the fan box I2 passes outwardlyof said bafiies Iii-l6, that is, through the fines I1I'|, whereas the gas in conduit I4 passes upwardly within the box-like bafiles I6I6. In other words, the gas from the conduit I4 passes through the fiues I8I8. The baffles I6-I6 therefore perform the function of stratifying the income gas and air so that no combustion of said gas and air will occur within the chamber I5. Preferably said baflles l6 are vertically disposed. The vertical arrangement of the baffles I6 avoids collection of dirt on the sides thereof. This arrangement has the further advantage of reducing the pressure drop through the burner chamber I5, since the gas in practically all commercial installations enters either from the top or from the bottom of the burner.

While the arrangement of alternate gas and air flues l1 and I8 has decided practical advantages, these advantages would not be retained to their fullest extent in connection with a simple spool or distance piece between the burner and the stove I0 for the reason that, because of quick mixing, combustion would take place shortly after the gas and air leave the burner chamber I5. Such combustion would take place so close to the end of the burner that any metallic spool or distance piece would be overheated. It is desirable that combustion shall not take place until the gas and air have entered those portions of the stove which are protected by refractories.

The numeral I9 indicates a spool or distance piece between the burner II and the stove I 0. Said distanc piece takes the form of a cylindrical sleeve having a length substantially equal to the distance between the end of the burner and the cooperating face of the door opening. This sleeve is adjustably suspended from an overhead trolley, indicated by the numeral 20, which is supported by and I-beam 2|. The spool or distance piece I9 should have sufilcient clearance with reference to the burner H and stove ID to permit it to be moved laterally out of alignment with the burner II and the door opening of the stove I0, whereby the sleeve l9 may be rolled out of operative position or back into operative position. It is desirable that the joints at the extremities of the sleeve 19 be tight when gas is being burned. In order to accomplish this result and at the same time to permit the sleeve I9 to be moved freely into and out of operative position, an adjusting ring 22 is provided on the burner housing. Said ring 22 includes an internally threaded sleeve 23 adapted to cooperate vvith a threaded shoulder 24 carried by the burner The ring 22 is provided with hand grips 2525 whereby said ring may be turned into holding engagement with the sleeve l9. In order to provide a tight joint between the sleeve Hi, the stove l and the burner H, the two opposite faces of the cylinder l9 may be provided with annular packing members 2626. The sleeve l9, as clearly indicated in Figure 4, is provided with a plurality of vertical partitions 2|-2'| dividing the sleeve l9 into a plurality of flues corresponding to the flues l1 and I8 within the chamber l of the burner Said partitions 2|2'| serve to keep the gas and air separated until they have passed through the sleeve l9 and have entered the stove l0. Of course, there will necessarily be a small clearance between the sleeve IB and the adjacent portion of the burner H and a small amount of gas and air mixing will take place at this point. This amount, however, will be so small as not to aifect the operation of the burner or the general result above described.

Referring now to the structure illustrated in Figure 5, a burner housing 28 is provided having a gas inlet conduit 29 and a fan 30. Said fan 30 directs air through the central conduit 3| and the gas passes through the annular space surrounding said conduit 3|. The space between the burner housing 28 and the stove I0 is adapted to be bridged by the spool or distance piece 32, which may be lifted by means of the cabl 33 trained over the pulleys 34 and operated from any convenient point. Said distance piece 32 is illustrated as being wedge-shaped in side elevation, though, of course, such Wedgeshaped construction is not essential. According to the illustrated construction, however, the cooperating face of the burner housing 28 is inclined to the vertical, whereas the cooperating face of the stove door opening is substantially vertical. A guide plate 35 is provided for guiding the distance piece 32 in its upward movement.

It will be clear that when the burner is to be disconnected from the stove the distance piece 32 may b lifted out of its operative position and a closure for the stove opening maybe moved into place. When it is desired to connect the burner to the stove said closure will be moved out of place and the distance piece 32 will be lowered into operative position. Packing material, indicated by the numeral 36,-is provided for insuring a tight connection between the, distance piece 32 andthestove l0. According, to the embodiment .of the. present invention illustrated in Figure 5, the gas in the conduit 3| is kept separated from the air in the annular passageway surrounding said conduit 3| by means of a sleeve 31 rigid with the distance piece 32. Said sleeve 31, when the distance piece 32 is in its operative position, is aligned with the conduit 3| and constitutes a continuation of said conduit 3|, whereby the gas and air delivered by th burner are kept separated until they enter the stove III.

In the two embodiments of the invention above described the gas and air are stratified upon entering the stove and intimate mixture will take place shortly after the gas and air leave the burner and enter the stove. This accelerates combustion.

Though certain embodiments of the present invention have been described in detail, many modifications will occur to those skilled in the art. It is intended to cover all such modifications that fall within'the scope of the appended claims.

What is claimed is- 1. In combination, a stove burner and a removable distance piece, means for supplying air under pressure to said burner and means for supplying gas to said burner, said distance piece having the function of connecting said burner to a stove, said burner and said distance piece having cooperating partitions for directing said air and said gas in proximity to each other to a stove while keeping said air and gas separated throughout the distance that said air and said gas must travel through said burner and substantially up to the pointof entry to said stove.

2. In combination, a stove burner and a removable distance piece, means-for supplying air under pressure to said burner and means for supplying gas to. said burner, said distance piece having the function of connecting said burner to a stove, said burner and said distance piece having cooperating partitions for directing said air and said gas in proximityto each other to a stove while keeping said air and gas separated throughout the distance thatsaid air and said gas must travel through said burner and substantially up to the point of entry to said stove, said partitions being vertically disposed.

3. In combination, astove burnerand a removable'distance piece, meansfor supplying air under pressure to-said burner andmeans for supplying gas to-said burner, said distance piece having the functionof connectingsaid burner to a stove, said burner having fines for delivering gas and air in adjacent paths while keeping said gas and airseparated, said distance piece having dividing means for keeping said. gas/and air separated through said distance piece upto substantially the point of entry of said gas and air into said stove.

4. In combination, a stove burner and a removable distancepieca-means for supplying. air under pressure tosaid burner and means for supplying gas to said burner, said distance piece having the function of connecting said burner to a stove, said-burner having fiues for delivering gas and air in adjacent paths while keeping said gas and air separated, said distance piece having dividing means for keeping said gas and air separated through said distance piece up to substantially the point of entry of said gas and air into said stove, said flues and said dividing means being vertically disposed.

'5.=In1-, combination, a stove burner and a removable distance piece, said distance piece having the function of connecting said burner to a stove, said burner having flues for delivering gas and air in adjacent paths while keeping said gas and air separated, said distance piece having dividing means for keeping said gas and air separated through said distance piece, said flues being coaxial and said dividing means being of symmetrical configuration.

6. In combination, a stove burner, a removable distance piece, means for supplying air under pressure to said burner, means for supplying gas under pressure to said burner, said distance piece having the function of connecting said burner to a stove, said burner and said distance piece having cooperating partitions for directing said air and said gas in proximity to each other to a stove while keeping said air and gas separated, said burner being provided with an adjustment ring for positioning said distance piece axially of said burner.

7. In combination, a stove burner, a removable distance piece, means for supplying air under pressure to said burner, means for supplying gas under pressure to said burner, said distance piece having the function of connecting said burner to a stove, said burner and said distance piece having cooperating partitions for directing said air and said gas in proximity to each other to a stove while keeping said air and gas separated, said burner having an adjustment ring threaded thereto for positioning said distance piece axially of said burner.

ARTHUR J. WHITCOMB. OLAF C. CALLOW. WILFRED Ci SCHOFIELD. 

